Germanium metal can through a small amount of energy (temperature) effect, but other semiconductor must through high amount of energy (high temperature, current, voltage), germanium nucleus around 32 electrons, most lateral orbital 4 electronic do irregular movement. Once the temperature rises, the lateral orbital an electronic could because of the stimulated from rail. And out of the track of electronic helps adjust biological balance of ions, make body neural circuits with abnormal returns to normal, prevent and improve body unwell feeling and massage the effect such as hot effect.